After turn 20 or whatever, they can become really annoying. The problem is that they don't seem to spot you and act aggressively (potentially because the AI isn't very good at the "walking up to enemies and hiding so you can attack them next turn"). There's also the thing where wounded enemies have a tendency to flee, which means you can safely shoot the closest enemies and they will retreat, then reconsider and move in, (or the opposite) which amounts to not making much progress.
It might be interesting to give them knowledge of the player location but reduce their aggression. This means they'll either sulk or, knowing that they are in range, strike at you. That's a behaviour that's pretty close to animals. Charging from long distances, especially under fire, isn't. Doing their thing/hiding until threatened (by the hunter coming close) and then striking out would be much more like it.
